The Large High Altitude Air Shower Observatory (LHAASO), a major national science and technology infrastructure in China, has recently made a breakthrough in exploring the extreme universe. For the first time, the collaboration has detected ultra-high-energy (UHE) gamma rays—with energies exceeding 100 TeV (100 trillion electron volts) — from a gamma-ray binary system LS I +61° 303. This dis...

The Large High Altitude Air Shower Observatory (LHAASO), has detected PeV (10¹⁵ eV) gamma-ray emission from a pulsar wind nebula powered by PSR J1849-0001 in the constellation Aquila. The observation reveals that the particle acceleration efficiency of this celestial structure approaches or even exceeds the theoretical limits allowed under ideal magnetohydrodynamic conditions, posing a seriou...

Recently, the Large High Altitude Air Shower Observatory (LHAASO) achieved a breakthrough in high-precision, element-resolved measurements of cosmic-ray spectra in the "knee" region. The LHAASO Collaboration has observed unexpected variations in the flux of helium nuclei in cosmic rays as a function of energy per nucleus, along with novel features in the evolution of cosmic ray abundance result...

The Symposium on Ultra-High-Energy Gamma Rays from Supernova Remnants and the Origin of Galactic Cosmic Rays (SNR Symposium) was successfully convened in Chengjiang, Yuxi, Yunnan Province, from February 26 to March 2.

Chinese researchers identify black holes as likely source of high-energy component of cosmic ray "knee"

The Large High Altitude Air Shower Observatory (LHAASO) officially released the precise measurements of high-energy gamma radiation from the W51 complex, confirming it as a cosmic-ray accelerator boosting particles up to so-called ultra-high energies (UHE, above 1014 electronvolts). This study also provides key evidence about the cosmic-ray acceleration limit in this complex. The findings, enti...

The Large High Altitude Air Shower Observatory (LHAASO) has accurately measured the cosmic ray all-particle energy spectrum and the mean logarithmic mass in the range of 0.3–30 peta-electronvolts (PeV). It has also discovered an “elbow” feature in the mean logarithmic mass spectrum of cosmic rays. The achievement, “Measurements of All-Particle Energy Spectrum and Mean Logarithmic Mass of Co...

The Large High-Altitude Air Shower Observatory (LHAASO) officially published its first catalog of gamma-ray sources in the Astrophysical Journal Supplement Series on Feb. 27. The first LHAASO catalog contains 90 very-high-energy (VHE) gamma-ray sources, 32 of which are new VHE sources, significantly increasing the number of gamma-ray sources in the VHE band. It also contains 43 ultra-high-energ...

The Large High Altitude Air Shower Observatory (LHAASO) has discovered a giant ultra-high-energy gamma-ray bubble structure in the Cygnus star-forming region, which is the first time in human history that the origin of cosmic rays with energy higher than 10 Peta-Electronvolt (PeV, 1PeV=1015eV) has been discovered. This achievement was officially published in the form of a cover article in Scien...

In recognition of research groups or individuals who have completed or demonstrated significant achievements within the past five years, the Chinese Academy of Sciences (CAS) awarded the 2023 Outstanding Science and Technology Achievement Prize on Dec. 23, 2023. The research group of Large High Altitude Air Shower Observatory (LHAASO) was honored with the 2023 Outstanding Science and Technolog...